Which is cheaper, the Hamilton American Classic Boulton Mechanical or the Grand Seiko SBGW306?

At MSRP the Hamilton American Classic Boulton Mechanical is the cheaper of the two at $1,075, against $17,900 for the Grand Seiko SBGW306 — a $16,825 gap before any retailer discounting.

Which is bigger, the Hamilton American Classic Boulton Mechanical or the Grand Seiko SBGW306?

The Grand Seiko SBGW306 wears larger at 36.5mm versus 34mm for the Hamilton American Classic Boulton Mechanical — a 2.5mm difference across the dial.

Which has better water resistance, the Hamilton American Classic Boulton Mechanical or the Grand Seiko SBGW306?

The Grand Seiko SBGW306 is rated to 100m versus 50m for the Hamilton American Classic Boulton Mechanical.

Which has a longer power reserve, the Hamilton American Classic Boulton Mechanical or the Grand Seiko SBGW306?

The Hamilton American Classic Boulton Mechanical carries a 80-hour power reserve against 72 hours on the Grand Seiko SBGW306.

What movement does the Hamilton American Classic Boulton Mechanical run compared to the Grand Seiko SBGW306?

Both watches run manual movements — the Hamilton American Classic Boulton Mechanical uses the H-50 and the Grand Seiko SBGW306 uses the 9S64.

Side by side

Hamilton American Classic Boulton MechanicalvsGrand Seiko SBGW306

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Hamilton American Classic Boulton Mechanical

h13519711

MSRP $1,075

Grand Seiko SBGW306

sbgw306j

MSRP $17,900

At a glance

11 of 29 specs differ

Diameter

American Classic Boulton Mechanical34mm

SBGW30636.5mm

Power Reserve

American Classic Boulton Mechanical80h

SBGW30672h

Water Resistance

American Classic Boulton Mechanical50m

SBGW306100m

MSRP

American Classic Boulton Mechanical$1,075

SBGW306$17,900

Full specifications

Case

6 specs

Diameter

34mm

36.5mm

Thickness

11.2mm

11.7mm

Lug-to-Lug

46mm

42.7mm

Lug Width

22mm

18mm

Material

Stainless Steel

Gold

Water Resistance

50m

100m

Crystal & Dial

2 specs

AR Coating

Inner

Yes

Dial Color

White

Black

Movement

2 specs

Caliber

H-50

9S64

Power Reserve

80h

72h

Pricing

1 specs

MSRP

$1,075

$17,900

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